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2 Sheets-heet W. I. CLASS. Valve-Gear for Fluid Motors.

Patented Apr"i|.13, 1880.

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n. FETms, PHOT `l 2 Sl-xeets--Sheet 2. W. F, CLASS. Valve-Gear for FluidMot-ors.`

226,494. PatentedApril I3, 1880.

zg?? i NPETERS. FHOTO LITHOGHAPHEH. WASHINGTON. D C.

UNiTEn STATES PATENT Orricn.

lVVILLIAll/I F. CLASS, OF CLEVELAND, OHIO, ASSIGNOR TO KIRK D. BISHOP,

- OF SAME PLACE.

VALVE-GEAR FOR FLUID-MOTORS.

SPECIFICATION forming part of Letters Patent No. 226,494, dated April13, 1880.

v Application filed December 5, 1879.

To all whom it may concern:

I Be it known that l, WILLIAM F. CLASS, of Cleveland, in the county otCuyahoga and State of Ohio, have invented certain Improvements inValve-Gearfor Fluid-Motors,of which .the following is a specification.

My invention has relation to an improvement in reciprocating motors ofthat class in which water or other luid under pressure fol- 1o lows thepiston throughout the length of the stroke.

The object I have in view, more particularly, is to provide awalking-beam motor with a simple and eiiective valve-gear for reversingthe ilow of the iiuid at the end of each stroke.

The invention consists in an oscillating disk or motion-plate, heavilyweighted at one side, connected through diametrically opposite wristsand slotted lifting-links with studs on zo the walking-beam, andprovided on the opposite side with two studs for actuating a tappetthrough which to shift the valves; also, in combination with the saidvalve-gear, a pair of piston-valves and their chambers, connected withthe supply-pipe and opposite ends of the motor-cylinder, as more fullyhereinafter set forth.

Figure l, Sheet l, is an elevation of the motor from the front orworking side. Fig. 2

3o is a longitudinal vertical section through the valves at .fr x. Fig.3, Sheet 2, is a rear elevation ofthe motor. Fig. 4l is a horizontalsection through the valves at y y. Fig. 5 is a similar section throughthe rock-shaft and face-plate 3 5 at z z.

In the drawings, A represents the cylinder of the motor, litted with apiston, whose rod A' is connected with one end of the walkingbeam B by alink, A2. The beam is mounted 4o in the jaws of a pillar, C, forming theupper part of a frame, C', with a pendent hanger, C2, Fig. 3, in thejaws of which a rocker-arm, D, is pivoted at its middle. To each end ofthis arm is pivoted a connecting rod, E, whose lower end is in turnpivoted to a piston-valve, F, working through both heads of acylindrical valve-case, G. The bore of these cylinders is greater thanthe diameter of their respective valves, and it will be noticed thateach cylinder is in two halves. Where these join an When the valve israised so that the ports b internally-projecting packing ring or cup, a,is inserted, as is also one under each head ofthe valve-cylinders. Thesecup -packings form, with the valves, two annular chambers in eachcylinder. To the upper one the supply-pipe H is connected, and with thelower chamber of one cylinder the pipe I opens a communication with theupper part of the motor-cylinder A above the piston. From the lowerchamber of the other cylinder a pipe, I', extends into the lower part ofsaid cylinder A below its piston.

The valve F is a hollow cylindrical piston, closed at the top, open atthe bottom, with a partition, F', in the middle, separating its upperfrom the lower chamber. Into the upper chamber vertical slots are cut,forming ports b, and into the lower chamber are cut similar ports o,through which the fluid is exhausted from the cylinder A. The top of theValve has a ange, under which is a rubber gasket to cushion the impactof the flange in arresting the descent of the valve. When the valve ismoved down water or other iiuid under pressure from the supply-pipeenters the upper compartment of the valve-case, passes into the upperchamber of the valve through the ports b, which are then partially belowthe middle packing-ring, a, and passes through into the lowercompartment of the valve-case, thence out through eduction-pipe I or I'of the cylinder A. The ports c being now below the lower packing-ring,a, the fluid cannot escape through the lower ports of the valve.

are above the middle packing-ring, a, the further admission of the fluidis cut oft' and the exhaust from the cylinder A comes back through thepipe I into the lower chamber of the valve-case, passing out through theports o, and is discharged through the bottom of the valve.

To operate these or otherV reciprocating valves a pendent tappet, D',iuay be keyed on the trunnion of the rocker-arm D. On a stud in the axisof the trunnion a disk, J, is mounted. An arm, K, is bolted to it, witha heavy weight, K', projecting to one side. On the back side of the diskare two roller-studs, d d, diametrically opposite to each other, one ofroo which, in each semi-rotation of the disk, strikes the tappet D/ andmoves it enough to shift-the position of the valves. rIhis movement istimed to take place ,just as the piston in the motor-cylinder is aboutto complete its stroke.

L L are two slotted links or connectingrods, curved as shown. The lowerend of each is pivoted to the face of the disk by a Wrist, c, While abeam-stud,f, projects through a slot, g, atits upper end, so that thesaid studs f act only in lifting the rods L, starting a semirotation ofthe disk. As the Weighted arm passes the vertical plane it drops withsuchy force that the roller-stud d Will strike the tappet with an impactsufficient to shift the valve.

From the free end of the beam motion may be transmitted to the machineryto be operated by this motor in any convenient manner.

Although I have shown a form of valves that is peculiarly adapted toWater-motors, I do not Wish to he confined to the use of this Aand itsstuds f j', for actuating a valvetappet,

substantially as described.

2. In combination With the cylinder of a motor, eduction and inductionpipes, and a valve-gear, substantially as described, thedouble-cliainbered piston-valves F, provided with ports b o and Workin gthrough the divided Y valve-chambers G G, having the packing-rings to a,arranged substantially as and for the purpose set forth.

WILLIAM F. CLASS. Vitnesses Jos. H. DOLL, JOHN G. BRIEGLEB.

